Letter sorter



FIG. 1 is a top, front and left side perspective view of a letter sorter showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear being identical;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a letter sorter, as shown and described. 